2100.1-n1 $$\Q(\sqrt{21})$$ 2100 2100.1 2100.1-n $$\bigl[1$$ , $$0$$ , $$1$$ , $$1149680 a - 3560313$$ , $$1101560992 a - 3154926684\bigr]$$
2100.1-bl1 $$\Q(\sqrt{21})$$ 2100 2100.1 2100.1-bl $$\bigl[a + 1$$ , $$-a + 1$$ , $$a$$ , $$-1706044 a - 3300813$$ , $$1911947903 a + 3471227548\bigr]$$